Hired Guns: The Jagged Edge

Formerly known as Jagged Alliance 3D.

From the website:

Hired Guns: The Jagged Edge is a turn-based strategy that puts you in command of a squad of specialists for hire in the genre’s biggest game-world yet. Choose “jobs” from different factions and complete them for cash to upgrade weapons and hire elite mercenaries.

Tons of guns will let your team destroy anything standing, but smooth talk and a wad of bills can also go a long way towards ensuring success. With multiple story lines and endings, you’re in total control of your own fate.